Beau (?), n.; pl. F. Beaux (E. pron. bz), E. Beaus (#). [F., a fop, fr. beau fine, beautiful, fr. L. bellus pretty, fine, for bonulus, dim. of bonus good. See Bounty, and cf. Belle, Beauty.]
1.
A man who takes great care to dress in the latest fashion; a dandy.
2.
A man who escorts, or pays attentions to, a lady; an escort; a lover.
© Webster 1913.